Type-writing machine.



A. G. F. KUROWSKI.

TYPE WRITING MACHINE.

APPLICATION FILED SEPT. 6. |917.

. Patened May 6, 1919.

LSQG.

. I *l WSKI, .0F BROOKLYN, NEW Y0 1:1

, SSIG'NOB, T0 UNDEWUD EITER COMPANY, 0F NEW YORK, N. Y., A CORPORATIN 01E reos, 1

Specication of Letters Patent.

Patented May 8, i949.

Original application iled March 14, 1917, Serial No. 154,650. Divided and this application filed eptemher (t,

1917. erial No. 189,907.

To all 'whom it may concern.'

Be it known that ll, Amann G. F. KURowsm, a subject of the Emperor of Germany, but having taken out preliminary United States naturalization papers, residing in Brooklyn borough, in the county of Kings, city and State of New York, have invented certain. new and useful Improvements in Type-Writing Machines, of which the following is a specification.

This invention relates to an improvement in typewriting machines, and more particularly to a sectional platen in which the separate parts may be rotated separately or in unison. This case is al division of my case No. 154,650, iled March 14, 1917. The platen is bipartite, so that as -each individual @ece of work is typewritten on the major section thereof, a continuons record of the several pieces of work can be kept on a continuous tally strip carried by a short section of the platen.

One of the main features of the invention is the support of the abutting ends of the two sections of the platen in a rigid and firm manner. This is accomplished by providing a sleeve stiiiening or arbor on the common platen axle where'the two ends of the sections of the platen abut both sections being supported upon this sleeve by means of secondary sleeves or bushings having considerable bearing' surfaces. Provision is made for readily assembling the parts and securing the major section against liability of becomin loose upon the platen axle by reason of t e violent operation of the linespacing devices.

Other features and advantages will hereinafter appear.

VIn the accompanying drawings,

Figure 1 is a perspective view of the platen.

A Fig. 2 is a fr ont view in elevation, partly broken away at the junction of the two sections of the platen, to show the underlying structure.

Referring more particularly to the separate parts of the invention, l indicates the platen which is provided with a platen axle 2 mounted to rotate on a platen frame 3.

prise each the usual tubular core on which the outer rubber coating 7 is secured. 'llhe section 4 may be considered the platen proper, and the section 5 an extension of the platen.

A special feature of the present case is Vthe manner of firmly supporting upon the weak platen axle the inner or abutting ends of the platen sections 4 and 5, or the platen proper and its extension, notwithstanding these ends abut at a point between the ends of the platen axle where it would be apt to spring or yield. This includes a sti'ening sleeve 8 secured to the platen axle 2 in a suitable manner, as by means of the set screw 9, which aids in securing the major section 4 against sli ping around the axle. The sleeve 8 projects partly to the right and left of the junction or abutting faces of the platen sections 4 and 5, indicated at 10. The sleeve 8 adds to the rigidity of the platen axle 2 at the plane where the platen sections 4 and 5 meet, and forms a bearing on which bushings, which may be in the form of spools 1l and 12, are mounted. The bushing 11 includes a mid section 13, having a flange 14 at one end which fits snugly in the core 6 of the platen section 4'. 'lhe bushing 11 also includes a large flange l5 which is of about the diameter of the core 6, and is covered by the rubber coating 7 of the platen section 4. This flange 15 forms a means of securing the bushing 11 to the platen section 4, which is accomplished by passing a screw 16 through an opening in the Harige 15 and threading it into an opening in the core 6 of the major platen section. Similarly,

- the bushing 12 is provided with a small collar 17, to tip section 18, and a large collar 19. This bushing 12 is secured tothe minor platen section 5 by means'of a screw 20.

rl[`he rubber coating 7 of the platen section or extension 5 also projects over the bushing 12. The coating 7 on both the major and minor sections extends far enough to meet, so as to bridge the gap between the two bushings 11 and 12. Bushing 11 is secured for rotation with the platen axle 2 by means of a pin` 21 which is secured to sleeve 8, and extends into a slot 22 provided in the bushing 11, which enables the parts to be assembled with ease, since the axle may be withdrawn far enough to let the small platen section 5 drop out, whereupon the screw 9 may be loosened, to permit sleeve 8 to be slipped ofi' from the axle, which may then be entirely withdrawn from the machine. The bushing 13 is made of substantial proportions, so as to afford a substantial and reliable slot-and-pin connection with the stiffened axle. The axle is journaled'at its ends as usual in the platen frame, and the described arrangement permits the ready withdrawal of the axle; the-stiifening sleeve being mounted between the bearings in which the axle is journaled, which are of the ordinary small-bore construction, too small to permit the passage of said sleeve therethrough. Thus the split platen may be applied to the machine readily and with little or no change in the machine, and the platen frame does not have to be dismantled 1n order to assemble or disassemble f the platen vsections therein.

The platen axle 2 is rotated by the usual knobs 23, provided at both ends thereof, and also by the usual Underwood line-space mechanism, indicated in general by the linespace lever 24. This line-space mechanism is more fully explained in the parent application." This enables the platen section 4 to b'e rotated major amounts by the hand knobs 23 or line-space intervals by means of the line-space lever 24. The platen axle revolves in bearings 25 which are usually duplicated at the ends of the platen frame 3. The extreme ends of the pla-ten structure 4, 5 are provided with the usual duplicate heads 26 having hubs 27 to fit the axle, although the usual set screw may be omitted from the right-hand hub 27, as it may turn independently of the axle.

The minor platen section or platen extension 5 may be rotated in any suitable manner, as, for example, by the special linespace mechanism for feeding the tally strip, as more fully described in the parent application. The minor section 5 may also be rotated in unison with the major platen section 4, by means of the usual typewriter line-space mechanism through the connecting linkages and gearing described in the parent case. In other words, as explained in the parent case, the two sections of the platen can rotate in unison, so as to linespace both line by line, enabling the typewriting of the items on the item sheet with the typewriting of the items on the tally sheet, also, enabling the separate manipulation of the major platen section relative to the minor platen section and the tally strip, so as to insert a new item sheet between each separate piece of work.

The operation of the device as a whole is more fully explained in the parent application, and the present improvement deals more specifically with the formation of a strong broad bearing at the junction between the two platen sections, so as to prevent any tendency of the sections to sag or get out of alinement with each other, while permittin ready assembling in an Underwood mac ine of usual construction.

Variations may be resorted to Within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine, the combinationwith a revoluble platen fast to an axle removably 'supported by its ends, of an extension of said platen supported at one end on said axle, a sleeve upon said axle between the ends thereof and forming a bearingfor the other end of said extension, means detachably securing said sleeve to said axle, and a bushing for said extension journaled on said sleeve.

2. In artypewriting machine, the comb-ination with a revoluble platen comprising two parts, of an axle journaled by its ends and extending through said platen, a sleeve fast on said axle between the ournaled ends thereof, means whereby said sleeve supports one part of said platen and compels it to turn therewith, and a bushing on said other platen portion and journaled on said sleeve and forming a bearing for said other platen portion.

3. In a typewriting machine, the combination with a revoluble platen and an axle therefor, a portion of said platen being separately revoluble from the rest, of a sleeve journaled on said axle, abushing supporting said separately revoluble portion, -a core for said separately revoluble "portion, iianges forming part of said bushing and engaging said core to support said separately revoluble portion, a second bushing fitted upon said sleeve, a core for the main part of the platen on said second bushing, flanges by which said core i-s supported and fastened, and

means for causing said second bushing to carry its part of the platen around with said sleeve. v

4. In a typewriting machine, the combination witha revoluble platen and an axle therefo-r, a portion of said platen being separately revoluble from the rest, of a sleeve for said axle where said two portions meet, a bushing journaled on said axle and supporting said separately revoluble portion, a core for said separately revoluble portion,

Lacasse a second bushing embracing the sleeve, a core for the main part of the platen supported on said second bushing, and a' projection on said sleeve engaging a slot in said first bushing for causing said sleeve and said first bushing to revolve together.

5. In a typewriting machine, the combination with a main platen portion and an axle therefor, a separately revoluble portion of the platen being journaled on said axle, of a sleeve on said axle where said portions of the platen meet, a bushing supporting said separately revoluble portion and journaled on said sleeve and extending only part way through said separately'revoluble portion, a journal for the other end ofv said revoluble portion embracing said axle, and a bushing on said main portion of the platen extending only part way thereof and revolving with the sleeve.

v6. ln a typewriting machine, the combination with a platen and an axle therefor, a separately revoluble portion of said platen being journaled on said axle, and a portion of said platen being fast on said axle, of a sleeve on said axle where said portions of the platen meet, a bushing supporting said separately revoluble portion journaled on said sleeve, a journal for the other end of said revoluble portion embracing said'axle, a bushing on said fast portion of the platen and revolving with the sleeve, said bushings slightly spaced from each other, and rubber surfaces on said portions of the platen bridging such space.

7. The combination with a platen axle, of a major platen section, a minor platen section, a sleeve on said axle extending to opposite sides of the plane of the abutting ends of the two platen sections, a bushing mounted on said sleeve and secured to one of said platen sections, anda second bushing mounted on said sleeve secured to the other of said platen sections, each of said bushings having a small collar extending into the platen sections and forming a supporting surface, and also a large collar overlapping` the end of the associated platen section.

8. The combination with a platen axle, of a bipartite platen mounted on said axle, said platen comprising two sections abutting end to end, a sleeve secured to said platen axle and overlapping both sections of said platen, a pair of bushings abutting end to end at the plane of junction of said platen sections, and having major collars overlapping the ends of said platen sections and minor collars, each located a considerable distance within the associated platen section from the plane of junction of the two platen sections, and means for securing said bushings to their associated platen sections.

9. rlhe combination with a platen axle, of a bipartite platen having two sections mounted on said axle, a sleeve secured to said platen axle and forming a bearing extending considerably to each side of the plane of junction between the sections of said platen, a bushing loosely mounted on said sleeve and secured to one of said platen sections, a second bushing secured to the other of said platen sections, and a pin-and- Vslot connection between said second bushing and saidl sleeve.

10. The combination with a platen axle, of a sleeve secured to said platen axle, a bipartite platen having sections abutting end to end, so that said sleeve extends conslderably into each section of said platen, a pair of bushings mounted on said sleeve and secured individually, one to each of said platen sections, and a pin-and-slot arranged to form a means of connection from said pxllaten to said sleeve, and thus to said platen 11. The combination with a platen frame, of a platen axle mounted in bearings therein and slidable through said bearings for removal, two juxtaposed relatively rotatable platen sections carried on said axle, a stiening sleeve upon said axle terminating between said bearings and arranged in proximity to the juxtaposed ends of said platen sections, means releasably securing said sleeve to said axle, to permit the insertion and withdrawal of the axle through said bearings, and a pin-and-slot connection between said sleeve and one of said platen sections, to compel the latter to turn with the axle, and to permit longitudinal displacement of the axle preparatory to the withdrawal thereof.

12. The combination with a platen frame, of a platen axle mounted in bearings therein and slidable through said bearings for removal, two juxtaposed relatively rotatable platen sections carried on said axle, astidening sleeve upon said axle terminating between said bearings and arranged in proximity to the juxtaposed ends of said platen sections, means releasably securing said sleeve to said axle, to .permit the insertion and withdrawal of the axle through said bearings, and a pin-and-slot connection between said sleeve and one of said platen sections, to compel the latter to turn with the axle, and to permit longitudinal displacement of the axle preparatory to the withdrawal thereof; the other 'platen section having a bearing upon said stidening sleeve.

13. The combination with a platen frame, of a platen axle mounted in bearings therein and slidable through said bearings for removal, two juxtaposed relatively rotatable platen sections carried on said axle, a stiftening sleeve upon said axle terminating between said bearings and arranged in proximity to the juxtaposed ends of said platen sections, means releasably securing said sleeve to said axle, to permit the insertion platen section to turn with the-axle, and to and -withdrawal of the axle through said permit longitudinal displacement of the axle bearmgs, a buslung fixed 1n one of sald preparatory to the withdrawal thereof.

platen sections, whereby said section is ALFRED G. F. KUROWSKI. mounted upon said stiffening sleeve, and a Witnesses: pin-and-slot connection between said sleeve CATHERINE A.- NEWEIL,

and said bushing, to compel the bushing and J ENNIE P. THORNE. 

